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Access denied error when updating Microsoft Defender from Fileshare
I read this document: https://docs.microsoft.com/en-us/microsoft-365/security/defender-endpoint/deployment-vdi-microsoft-defender-antivirus?view=o365-worldwide and I created a share on a VM calle...
- We did, but we had to update MS Defender to the absolute latest version during the image build process. We used this process here: https://support.microsoft.com/en-us/topic/microsoft-defender-update-for-windows-operating-system-installation-images-1c89630b-61ff-00a1-04e2-2d1f3865450d
We also found that once it is working - if you set the update path post windows install it works, but says something like "it won't take effect until restart"... So I had to change that option during image build using a ps script:
Set-MpPreference -SharedSignaturesPath \\csabots2019\wdav-update - then reboot before sysprep.
Bottom line - the MS doc on how to do this is woefully incomplete.
Funny, after I replied that's exactly what I found - the required reboot before changes took effect. I didn't want to bake those settings into my image, but here we are. I baked them in via PowerShell just like you have, and since doing that, updates have been working flawlessly.
NickPanaccio Nice! I should add we're just using configmgr to make the reference vdi image - so it was pretty simple to add another reboot.